win定时器 CreateTimerQueueTimer

最近使用iocp,需要定时器检测客户端是否过期,之前使用一个线程专门做检查,感觉不合适,可以采用定时器 

CreateTimerQueueTimer

 

参考MSDN上的信息

 

https://docs.microsoft.com/zh-cn/windows/win32/api/threadpoollegacyapiset/nf-threadpoollegacyapiset-createtimerqueuetimer?redirectedfrom=MSDN

https://docs.microsoft.com/en-us/previous-versions/windows/desktop/legacy/ms687066(v=vs.85)

https://docs.microsoft.com/en-us/windows/win32/sync/using-timer-queues

 

总结下来是四个函数调用和一个传入函数

 

 

 

//官方的案例

#include <windows.h>
#include <stdio.h>

HANDLE gDoneEvent;

VOID CALLBACK TimerRoutine(PVOID lpParam, BOOLEAN TimerOrWaitFired)
{
    if (lpParam == NULL)
    {
        printf("TimerRoutine lpParam is NULL\n");
    }
    else
    {
        // lpParam points to the argument; in this case it is an int

        printf("Timer routine called. Parameter is %d.\n", 
                *(int*)lpParam);
        if(TimerOrWaitFired)
        {
            printf("The wait timed out.\n");
        }
        else
        {
            printf("The wait event was signaled.\n");
        }
    }

    SetEvent(gDoneEvent);
}

int main()
{
    HANDLE hTimer = NULL;
    HANDLE hTimerQueue = NULL;
    int arg = 123;

    // Use an event object to track the TimerRoutine execution
    gDoneEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
    if (NULL == gDoneEvent)
    {
        printf("CreateEvent failed (%d)\n", GetLastError());
        return 1;
    }

    // Create the timer queue.
    hTimerQueue = CreateTimerQueue();
    if (NULL == hTimerQueue)
    {
        printf("CreateTimerQueue failed (%d)\n", GetLastError());
        return 2;
    }

    // Set a timer to call the timer routine in 10 seconds.
    if (!CreateTimerQueueTimer( &hTimer, hTimerQueue, 
            (WAITORTIMERCALLBACK)TimerRoutine, &arg , 10000, 0, 0))
    {
        printf("CreateTimerQueueTimer failed (%d)\n", GetLastError());
        return 3;
    }

    // TODO: Do other useful work here 

    printf("Call timer routine in 10 seconds...\n");

    // Wait for the timer-queue thread to complete using an event 
    // object. The thread will signal the event at that time.

    if (WaitForSingleObject(gDoneEvent, INFINITE) != WAIT_OBJECT_0)
        printf("WaitForSingleObject failed (%d)\n", GetLastError());

    CloseHandle(gDoneEvent);

    // Delete all timers in the timer queue.
    if (!DeleteTimerQueue(hTimerQueue))
        printf("DeleteTimerQueue failed (%d)\n", GetLastError());

    return 0;
}

 

 

// 自己抽离出来的案例

#include <windows.h>
#include <stdio.h>

//创建队列
HANDLE hTimer = hTimerQueue = CreateTimerQueue();
if (NULL == hTimerQueue)
{
    printf("CreateTimerQueue failed (%d)\n", GetLastError());
    return 2;
}

//启动一个定时器,    此处第一个10000意思是10秒后启动一次回调函数,如果为0,则表示立即启动  此处第二个10000表示这个定时器每过10秒启动一次,为0则表示这个定时器只启动一次,  如果这两个值相同则第一次定时时间到了,经过测试,回调函数只启动一次,不会启动两次
HANDLE hTimer = NULL;
int arg = 123;
if (!CreateTimerQueueTimer( &hTimer, hTimerQueue, 
            (WAITORTIMERCALLBACK)TimerRoutine, &arg , 10000, 10000, 0))
{
    printf("CreateTimerQueueTimer failed (%d)\n", GetLastError());
    return 3;
}
//删除其中一个定时器
if(!DeleteTimerQueueTimer(hTimerQueue,hTimer,NULL))
    printf("DeleteTimerQueueTimer failed (%d)\n", GetLastError());

//关闭定时器队列
if (!DeleteTimerQueue(hTimerQueue))
        printf("DeleteTimerQueue failed (%d)\n", GetLastError());
        
        
//调用的函数     TimerOrWaitFired 如果是正常的 timerOut 则为true ,如果是不正常的被关闭了,则为 false
VOID CALLBACK TimerRoutine(PVOID lpParam, BOOLEAN TimerOrWaitFired)
{
    if (lpParam == NULL)
    {
        printf("TimerRoutine lpParam is NULL\n");
    }
    else
    {
        // lpParam points to the argument; in this case it is an int
        printf("Timer routine called. Parameter is %d.\n", 
                *(int*)lpParam);
        if(TimerOrWaitFired)
        {
            printf("The wait timed out.\n");
        }
        else
        {
            printf("The wait event was signaled.\n");
        }
    }
}

 

 

 

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